./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 279fae57395782089eff32ec1396d1726d808c7f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 19:24:58,643 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:24:58,644 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:24:58,650 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:24:58,650 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:24:58,650 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:24:58,651 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:24:58,652 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:24:58,652 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:24:58,653 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:24:58,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:24:58,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:24:58,654 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:24:58,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:24:58,654 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:24:58,655 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:24:58,655 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:24:58,656 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:24:58,657 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:24:58,658 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:24:58,658 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:24:58,659 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:24:58,660 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:24:58,660 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:24:58,660 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:24:58,660 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:24:58,661 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:24:58,661 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:24:58,662 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:24:58,662 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:24:58,662 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:24:58,663 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:24:58,663 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:24:58,663 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:24:58,663 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:24:58,664 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:24:58,664 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 19:24:58,671 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:24:58,671 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:24:58,671 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:24:58,672 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:24:58,672 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:24:58,673 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:24:58,673 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 19:24:58,674 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:24:58,674 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:24:58,674 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 19:24:58,675 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:24:58,675 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:24:58,675 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:24:58,675 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 19:24:58,675 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279fae57395782089eff32ec1396d1726d808c7f [2018-12-09 19:24:58,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:24:58,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:24:58,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:24:58,705 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:24:58,706 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:24:58,706 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i [2018-12-09 19:24:58,747 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/data/068246a47/9f8362f89cd6436887969ecd8dbed3cb/FLAG6c58d0c87 [2018-12-09 19:24:59,171 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:24:59,171 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i [2018-12-09 19:24:59,174 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/data/068246a47/9f8362f89cd6436887969ecd8dbed3cb/FLAG6c58d0c87 [2018-12-09 19:24:59,182 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/data/068246a47/9f8362f89cd6436887969ecd8dbed3cb [2018-12-09 19:24:59,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:24:59,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:24:59,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:24:59,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:24:59,188 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:24:59,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d58bc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59, skipping insertion in model container [2018-12-09 19:24:59,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:24:59,204 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:24:59,294 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:24:59,300 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:24:59,314 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:24:59,324 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:24:59,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59 WrapperNode [2018-12-09 19:24:59,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:24:59,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:24:59,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:24:59,325 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:24:59,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:24:59,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:24:59,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:24:59,379 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:24:59,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... [2018-12-09 19:24:59,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:24:59,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:24:59,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:24:59,401 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:24:59,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:24:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 19:24:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:24:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:24:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:24:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:24:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:24:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 19:24:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:24:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:24:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-12-09 19:24:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-12-09 19:24:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:24:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-12-09 19:24:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-12-09 19:24:59,569 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:24:59,569 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 19:24:59,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:59 BoogieIcfgContainer [2018-12-09 19:24:59,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:24:59,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:24:59,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:24:59,572 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:24:59,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:24:59" (1/3) ... [2018-12-09 19:24:59,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63085504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:24:59, skipping insertion in model container [2018-12-09 19:24:59,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:59" (2/3) ... [2018-12-09 19:24:59,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63085504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:24:59, skipping insertion in model container [2018-12-09 19:24:59,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:59" (3/3) ... [2018-12-09 19:24:59,574 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum_false-unreach-call_true-termination.i [2018-12-09 19:24:59,580 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:24:59,584 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 19:24:59,593 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 19:24:59,612 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:24:59,612 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 19:24:59,612 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:24:59,613 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:24:59,613 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:24:59,613 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:24:59,613 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:24:59,613 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:24:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-09 19:24:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 19:24:59,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:24:59,627 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:24:59,628 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:24:59,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:24:59,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2018-12-09 19:24:59,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:24:59,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:24:59,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:24:59,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:24:59,668 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:24:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:24:59,725 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-09 19:24:59,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:24:59,726 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:24:59,726 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-12-09 19:24:59,728 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [28], [30], [33], [34], [45], [51], [66], [68], [69], [81], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:24:59,749 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:24:59,749 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:24:59,822 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 19:24:59,823 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 3. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 26 variables. [2018-12-09 19:24:59,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:24:59,829 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 19:24:59,863 INFO L227 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 92.26% of their original sizes. [2018-12-09 19:24:59,863 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 19:24:59,872 INFO L418 sIntCurrentIteration]: We unified 37 AI predicates to 37 [2018-12-09 19:24:59,872 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 19:24:59,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:24:59,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:24:59,873 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:24:59,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:24:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:24:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:24:59,881 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2018-12-09 19:24:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:24:59,950 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2018-12-09 19:24:59,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:24:59,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-12-09 19:24:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:24:59,956 INFO L225 Difference]: With dead ends: 67 [2018-12-09 19:24:59,956 INFO L226 Difference]: Without dead ends: 33 [2018-12-09 19:24:59,958 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:24:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-09 19:24:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-09 19:24:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 19:24:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-12-09 19:24:59,981 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2018-12-09 19:24:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:24:59,981 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-12-09 19:24:59,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:24:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-12-09 19:24:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 19:24:59,982 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:24:59,982 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:24:59,982 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:24:59,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:24:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2018-12-09 19:24:59,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:24:59,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:24:59,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:24:59,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:24:59,983 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:24:59,993 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:24:59,993 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:24:59,994 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:00,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:00,002 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:00,033 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-12-09 19:25:00,033 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [28], [30], [33], [34], [45], [51], [66], [68], [69], [75], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:25:00,034 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:25:00,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:25:00,137 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 19:25:00,137 INFO L272 AbstractInterpreter]: Visited 17 different actions 17 times. Never merged. Never widened. Performed 107 root evaluator evaluations with a maximum evaluation depth of 11. Performed 107 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Never found a fixpoint. Largest state had 26 variables. [2018-12-09 19:25:00,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:00,145 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 19:25:00,200 INFO L227 lantSequenceWeakener]: Weakened 15 states. On average, predicates are now at 86.07% of their original sizes. [2018-12-09 19:25:00,200 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 19:25:00,242 INFO L418 sIntCurrentIteration]: We unified 37 AI predicates to 37 [2018-12-09 19:25:00,242 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 19:25:00,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:25:00,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 19:25:00,242 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:25:00,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:25:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:25:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-09 19:25:00,244 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2018-12-09 19:25:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:00,553 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2018-12-09 19:25:00,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 19:25:00,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2018-12-09 19:25:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:00,556 INFO L225 Difference]: With dead ends: 67 [2018-12-09 19:25:00,556 INFO L226 Difference]: Without dead ends: 49 [2018-12-09 19:25:00,557 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:25:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-09 19:25:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2018-12-09 19:25:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 19:25:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2018-12-09 19:25:00,566 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2018-12-09 19:25:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:00,566 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2018-12-09 19:25:00,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:25:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2018-12-09 19:25:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 19:25:00,567 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:00,567 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:00,568 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:00,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2018-12-09 19:25:00,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:00,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:00,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:00,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:00,569 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 19:25:00,687 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:25:00,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-09 19:25:00,687 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:25:00,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 19:25:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 19:25:00,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:25:00,690 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 9 states. [2018-12-09 19:25:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:00,819 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2018-12-09 19:25:00,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 19:25:00,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2018-12-09 19:25:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:00,820 INFO L225 Difference]: With dead ends: 63 [2018-12-09 19:25:00,820 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 19:25:00,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:25:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 19:25:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2018-12-09 19:25:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 19:25:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2018-12-09 19:25:00,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 38 [2018-12-09 19:25:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:00,827 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2018-12-09 19:25:00,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 19:25:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2018-12-09 19:25:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 19:25:00,828 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:00,828 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:00,828 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:00,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:00,828 INFO L82 PathProgramCache]: Analyzing trace with hash 699235283, now seen corresponding path program 1 times [2018-12-09 19:25:00,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:00,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:00,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:00,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:00,829 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:00,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:00,839 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:00,839 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:00,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:00,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:00,878 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-12-09 19:25:00,879 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [28], [30], [33], [34], [45], [51], [53], [56], [60], [66], [67], [68], [69], [75], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:25:00,880 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:25:00,880 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:25:01,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:25:01,881 INFO L272 AbstractInterpreter]: Visited 34 different actions 292 times. Merged at 17 different actions 168 times. Widened at 1 different actions 7 times. Performed 1432 root evaluator evaluations with a maximum evaluation depth of 11. Performed 1432 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 44 fixpoints after 6 different actions. Largest state had 26 variables. [2018-12-09 19:25:01,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:01,886 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:25:01,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:01,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:01,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:01,892 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:25:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:01,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:25:01,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:25:01,985 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:25:01,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2018-12-09 19:25:01,985 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:25:01,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:25:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:25:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-09 19:25:01,985 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 4 states. [2018-12-09 19:25:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:02,016 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2018-12-09 19:25:02,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:25:02,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-09 19:25:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:02,018 INFO L225 Difference]: With dead ends: 83 [2018-12-09 19:25:02,018 INFO L226 Difference]: Without dead ends: 48 [2018-12-09 19:25:02,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-09 19:25:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-09 19:25:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-12-09 19:25:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-09 19:25:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2018-12-09 19:25:02,023 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 41 [2018-12-09 19:25:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:02,023 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2018-12-09 19:25:02,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:25:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2018-12-09 19:25:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 19:25:02,024 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:02,024 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:02,025 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:02,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1178839093, now seen corresponding path program 1 times [2018-12-09 19:25:02,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:02,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:02,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:02,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:02,026 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:02,034 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:02,034 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:02,034 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:02,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:02,040 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:02,063 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 44 with the following transitions: [2018-12-09 19:25:02,063 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [28], [30], [33], [34], [45], [51], [53], [56], [60], [66], [67], [68], [69], [75], [77], [79], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:25:02,064 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:25:02,064 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:25:02,572 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:25:02,573 INFO L272 AbstractInterpreter]: Visited 36 different actions 293 times. Merged at 21 different actions 168 times. Widened at 2 different actions 6 times. Performed 1441 root evaluator evaluations with a maximum evaluation depth of 11. Performed 1441 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 44 fixpoints after 8 different actions. Largest state had 26 variables. [2018-12-09 19:25:02,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:02,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:25:02,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:02,574 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:02,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:02,582 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:25:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:02,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:25:02,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:25:02,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:25:02,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2018-12-09 19:25:02,690 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:25:02,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:25:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:25:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-12-09 19:25:02,691 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 8 states. [2018-12-09 19:25:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:02,760 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2018-12-09 19:25:02,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 19:25:02,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2018-12-09 19:25:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:02,761 INFO L225 Difference]: With dead ends: 85 [2018-12-09 19:25:02,761 INFO L226 Difference]: Without dead ends: 50 [2018-12-09 19:25:02,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:25:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-09 19:25:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-12-09 19:25:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-09 19:25:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-12-09 19:25:02,768 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 43 [2018-12-09 19:25:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:02,769 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-12-09 19:25:02,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:25:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-12-09 19:25:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 19:25:02,770 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:02,770 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:02,770 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:02,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1778367465, now seen corresponding path program 2 times [2018-12-09 19:25:02,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:02,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:02,771 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:02,781 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:02,781 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:02,782 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:02,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:25:02,790 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:02,822 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:25:02,822 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:25:02,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:02,822 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:02,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:25:02,828 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:25:02,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 19:25:02,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:25:02,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 19:25:02,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 19:25:02,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:25:02,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2018-12-09 19:25:02,920 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:25:02,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:25:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:25:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-12-09 19:25:02,921 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 8 states. [2018-12-09 19:25:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:02,968 INFO L93 Difference]: Finished difference Result 86 states and 124 transitions. [2018-12-09 19:25:02,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 19:25:02,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2018-12-09 19:25:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:02,969 INFO L225 Difference]: With dead ends: 86 [2018-12-09 19:25:02,969 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 19:25:02,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:25:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 19:25:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-12-09 19:25:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-09 19:25:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2018-12-09 19:25:02,974 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 45 [2018-12-09 19:25:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:02,974 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2018-12-09 19:25:02,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:25:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2018-12-09 19:25:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 19:25:02,975 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:02,975 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:02,975 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:02,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1346922871, now seen corresponding path program 1 times [2018-12-09 19:25:02,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:02,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:02,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:25:02,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:02,976 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:02,986 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:02,986 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:02,986 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:02,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:02,994 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:03,023 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 64 with the following transitions: [2018-12-09 19:25:03,023 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [28], [30], [33], [34], [45], [51], [53], [56], [58], [60], [66], [67], [68], [69], [75], [77], [79], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:25:03,024 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:25:03,024 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:25:03,539 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:25:03,539 INFO L272 AbstractInterpreter]: Visited 37 different actions 337 times. Merged at 22 different actions 182 times. Widened at 2 different actions 7 times. Performed 1602 root evaluator evaluations with a maximum evaluation depth of 11. Performed 1602 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 74 fixpoints after 11 different actions. Largest state had 26 variables. [2018-12-09 19:25:03,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:03,541 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:25:03,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:03,541 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:03,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:03,547 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:25:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:03,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-12-09 19:25:03,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-12-09 19:25:03,609 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:25:03,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-12-09 19:25:03,610 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:25:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:25:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:25:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:25:03,611 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 4 states. [2018-12-09 19:25:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:03,636 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2018-12-09 19:25:03,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:25:03,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-12-09 19:25:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:03,637 INFO L225 Difference]: With dead ends: 84 [2018-12-09 19:25:03,637 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 19:25:03,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:25:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 19:25:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2018-12-09 19:25:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 19:25:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2018-12-09 19:25:03,642 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 63 [2018-12-09 19:25:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:03,642 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2018-12-09 19:25:03,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:25:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2018-12-09 19:25:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-09 19:25:03,643 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:03,643 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:03,643 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:03,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2018-12-09 19:25:03,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:03,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:03,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:03,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:03,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:03,653 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:03,653 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:03,653 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:03,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:03,659 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:03,684 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 66 with the following transitions: [2018-12-09 19:25:03,684 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [22], [24], [28], [30], [33], [34], [45], [51], [53], [56], [58], [60], [66], [67], [68], [69], [75], [77], [79], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:25:03,685 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:25:03,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:25:04,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:25:04,267 INFO L272 AbstractInterpreter]: Visited 39 different actions 394 times. Merged at 24 different actions 214 times. Widened at 3 different actions 9 times. Performed 1898 root evaluator evaluations with a maximum evaluation depth of 11. Performed 1898 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 89 fixpoints after 13 different actions. Largest state had 28 variables. [2018-12-09 19:25:04,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:04,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:25:04,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:04,269 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:04,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:04,275 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:25:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:04,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 19:25:04,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 19:25:04,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:25:04,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2018-12-09 19:25:04,444 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:25:04,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 19:25:04,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 19:25:04,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:25:04,444 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2018-12-09 19:25:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:04,535 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2018-12-09 19:25:04,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 19:25:04,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2018-12-09 19:25:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:04,536 INFO L225 Difference]: With dead ends: 139 [2018-12-09 19:25:04,536 INFO L226 Difference]: Without dead ends: 78 [2018-12-09 19:25:04,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-12-09 19:25:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-09 19:25:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-12-09 19:25:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-09 19:25:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2018-12-09 19:25:04,545 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2018-12-09 19:25:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:04,545 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2018-12-09 19:25:04,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 19:25:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2018-12-09 19:25:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-09 19:25:04,546 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:04,546 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:04,546 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:04,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2018-12-09 19:25:04,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:04,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:04,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:04,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:04,547 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:04,559 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:04,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:04,560 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:04,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:25:04,566 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:04,591 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:25:04,591 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:25:04,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:04,591 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:04,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:25:04,597 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:25:04,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 19:25:04,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:25:04,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 69 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-09 19:25:04,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-12-09 19:25:04,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:25:04,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2018-12-09 19:25:04,773 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:25:04,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 19:25:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 19:25:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-09 19:25:04,774 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 10 states. [2018-12-09 19:25:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:04,965 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2018-12-09 19:25:04,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 19:25:04,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2018-12-09 19:25:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:04,966 INFO L225 Difference]: With dead ends: 149 [2018-12-09 19:25:04,967 INFO L226 Difference]: Without dead ends: 72 [2018-12-09 19:25:04,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-12-09 19:25:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-09 19:25:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2018-12-09 19:25:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 19:25:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2018-12-09 19:25:04,974 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2018-12-09 19:25:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:04,975 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2018-12-09 19:25:04,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 19:25:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2018-12-09 19:25:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 19:25:04,975 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:04,975 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:04,976 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:04,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2018-12-09 19:25:04,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:04,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:04,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:25:04,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:04,977 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:04,984 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:04,984 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:04,984 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:04,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:04,990 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:05,016 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 74 with the following transitions: [2018-12-09 19:25:05,016 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [14], [20], [22], [24], [28], [30], [33], [34], [45], [51], [53], [56], [58], [60], [66], [68], [69], [75], [77], [79], [83], [84], [85], [86], [88], [89], [90], [91], [92], [93], [94], [95] [2018-12-09 19:25:05,017 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:25:05,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:25:05,470 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:25:05,470 INFO L272 AbstractInterpreter]: Visited 38 different actions 267 times. Merged at 23 different actions 138 times. Widened at 3 different actions 6 times. Performed 1294 root evaluator evaluations with a maximum evaluation depth of 11. Performed 1294 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 48 fixpoints after 9 different actions. Largest state had 28 variables. [2018-12-09 19:25:05,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:05,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:25:05,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:25:05,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:25:05,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:05,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:25:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:25:05,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:25:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-12-09 19:25:05,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:25:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-12-09 19:25:05,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:25:05,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-12-09 19:25:05,589 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:25:05,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 19:25:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 19:25:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-12-09 19:25:05,589 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2018-12-09 19:25:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:25:05,636 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2018-12-09 19:25:05,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:25:05,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2018-12-09 19:25:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:25:05,637 INFO L225 Difference]: With dead ends: 86 [2018-12-09 19:25:05,637 INFO L226 Difference]: Without dead ends: 62 [2018-12-09 19:25:05,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:25:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-09 19:25:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2018-12-09 19:25:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-09 19:25:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2018-12-09 19:25:05,642 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2018-12-09 19:25:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:25:05,642 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2018-12-09 19:25:05,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 19:25:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2018-12-09 19:25:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-09 19:25:05,643 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:25:05,643 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:25:05,643 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:25:05,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:25:05,643 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2018-12-09 19:25:05,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:25:05,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:05,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:25:05,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:25:05,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:25:05,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 19:25:05,649 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 19:25:05,649 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 19:25:05,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:25:05,656 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 19:25:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:25:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:25:05,732 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 19:25:05,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:25:05 BoogieIcfgContainer [2018-12-09 19:25:05,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:25:05,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:25:05,765 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:25:05,765 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:25:05,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:59" (3/4) ... [2018-12-09 19:25:05,767 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 19:25:05,824 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9a2f8787-b561-4991-919e-1336396e212a/bin-2019/utaipan/witness.graphml [2018-12-09 19:25:05,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:25:05,825 INFO L168 Benchmark]: Toolchain (without parser) took 6640.12 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 562.0 MB). Free memory was 949.7 MB in the beginning and 867.7 MB in the end (delta: 82.0 MB). Peak memory consumption was 644.0 MB. Max. memory is 11.5 GB. [2018-12-09 19:25:05,826 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:25:05,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.78 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:25:05,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-12-09 19:25:05,827 INFO L168 Benchmark]: Boogie Preprocessor took 21.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:25:05,827 INFO L168 Benchmark]: RCFGBuilder took 169.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 11.5 GB. [2018-12-09 19:25:05,827 INFO L168 Benchmark]: TraceAbstraction took 6193.76 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 418.4 MB). Free memory was 1.1 GB in the beginning and 867.7 MB in the end (delta: 251.6 MB). Peak memory consumption was 670.0 MB. Max. memory is 11.5 GB. [2018-12-09 19:25:05,827 INFO L168 Benchmark]: Witness Printer took 59.62 ms. Allocated memory is still 1.6 GB. Free memory is still 867.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:25:05,829 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.78 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 169.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6193.76 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 418.4 MB). Free memory was 1.1 GB in the beginning and 867.7 MB in the end (delta: 251.6 MB). Peak memory consumption was 670.0 MB. Max. memory is 11.5 GB. * Witness Printer took 59.62 ms. Allocated memory is still 1.6 GB. Free memory is still 867.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=7, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={9:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={9:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={9:0}, x={9:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={9:0}, x={9:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={9:0}, x={9:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={9:0}, x={9:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={9:0}, x={9:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={9:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={9:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={9:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-242, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-242, x={9:0}, x={9:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-242, x={9:0}, x={9:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-242, cnt=1, i=3, N=3, ret=-242, x={9:0}, x={9:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-242, x={9:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-242, temp=-241, x={9:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={9:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-242, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-242, x={9:0}, x={9:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-242, x={9:0}, x={9:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-242, cnt=1, i=3, N=3, ret=-242, x={9:0}, x={9:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-242, ret=-242, temp=-241, x={9:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-242, ret2=-242, temp=419, x={9:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=419, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=419, x={9:0}, x={9:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=419, x={9:0}, x={9:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=419, cnt=1, i=3, N=3, ret=419, x={9:0}, x={9:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=419, ret=-242, ret2=-242, temp=419, x={9:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-242, ret2=-242, ret5=419, temp=419, x={9:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-242, ret2=-242, ret5=419, temp=419, x={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. UNSAFE Result, 6.1s OverallTime, 11 OverallIterations, 9 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 329 SDtfs, 342 SDslu, 729 SDs, 0 SdLazy, 622 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 891 GetRequests, 792 SyntacticMatches, 21 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.2s AbstIntTime, 7 AbstIntIterations, 2 AbstIntStrong, 0.9393763893763891 AbsIntWeakeningRatio, 1.3783783783783783 AbsIntAvgWeakeningVarsNumRemoved, 1.5 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 49 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 983 NumberOfCodeBlocks, 953 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 817 ConstructedInterpolants, 0 QuantifiedInterpolants, 107525 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1279 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 1046/1085 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...